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Analog Devices Inc./Maxim Integrated MAX354CWE+
- Part No.:
- MAX354CWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX354CWE+.pdf
- Description:
- IC MUX 8:1 350OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:866
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Product details
Overview
MAX354CWE+ from Maxim Integrated is a fault-protected single 8-channel analog multiplexer designed for high-reliability signal routing in industrial and avionics systems. It operates from ±4.5V to ±18V dual supplies (or +4.5V to +36V single supply), features 350Ω max on-resistance, <0.5nA input leakage at +25°C, and guarantees break-before-make switching. It protects against ±40V overvoltage with power off and clamps outputs to within 1.5V of supply rails during faults.
For engineers reviewing the MAX354CWE+ datasheet, MAX354CWE+ pinout, MAX354CWE+ application, or MAX354CWE+ equivalent, key selection considerations include its fault-tolerant series N-P-N switch architecture, guaranteed 100ns break-before-make interval, ±40V fault protection with supplies off, and compatibility with TTL/CMOS logic without pull-ups.
Technical Context
The MAX354CWE+ implements a three-FET series structure (N–P–N) that actively limits fault current to sub-microamp levels when analog inputs exceed ±13.5V relative to supplies. During overvoltage, on-resistance rises asymptotically to infinity while output voltage clamps at V+ −1.5V or V− +1.5V - preserving polarity and preventing glitches.
Its digital interface uses rail-independent 0.8V/2.4V logic thresholds referenced to GND, enabling direct TTL/CMOS drive across full supply range (±4.5V to ±18V). All switches turn off automatically when supplies are absent, and enable-controlled channel selection supports demultiplexing with identical fault protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance | 350Ω max - ensures minimal signal attenuation and gain error in precision measurement paths |
| Fault Protection Range | ±40V with supplies off - enables hot-swap and undervoltage-safe operation in rugged environments |
| Input Leakage Current | <0.5nA at +25°C - preserves high-impedance sensor node integrity and reduces offset drift |
| Break-Before-Make Interval | 100ns min - prevents momentary input-to-input shorting during channel switching |
| Logic Thresholds | 0.8V low / 2.4V high - eliminates need for pull-up resistors with standard TTL/CMOS microcontrollers |
| Analog Signal Range | ±12V typical with ±15V supplies - supports wide dynamic range in data-acquisition front-ends |
| Charge Injection | 15pC to 180pC depending on supply - determines settling time and step error in S/H circuits |
Pinout & Package
MAX354CWE+ is housed in a 16-pin wide SO (SOIC-W) package with 0.3-inch body width and standard 1.27mm pitch. Pin 1 is A1 (MSB address), pin 8 is COM (common analog terminal), and pin 16 is A2 (LSB address); all analog I/O pins are bidirectional and electrically interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Binary address inputs | Select one of eight NOx channels to connect to COM; no external decoding required |
| EN | Enable control input | High enables channel switching; low forces all switches open regardless of address state |
| COM | Common analog terminal | Bidirectional path shared by all eight channels; connects to ADC input or DAC output |
| NO1–NO8 | Individual analog terminals | Each functions as input or output; all support ±40V fault tolerance independent of supply state |
| V+, V− | Power supply rails | Support dual ±4.5V to ±18V or single +4.5V to +36V operation; V− tied to GND for single-supply use |
| GND | Ground reference | Logic threshold reference and substrate connection point; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Fault protection with supplies off | Withstands ±40V continuous overvoltage even when V+/V− = 0V - eliminates need for external TVS or series resistors |
| Output clamping during fault | Clamps COM output to V+ −1.5V or V− +1.5V - prevents downstream component damage without polarity reversal |
| No power-up sequencing required | Operates correctly regardless of V+, V−, or logic supply ramp order - simplifies system power management |
| Demultiplexing capability | Supports reverse signal flow (COM → NOx) with identical fault protection and break-before-make timing |
| TTL/CMOS logic compatibility | 0.8V/2.4V thresholds work across full temperature and supply range - interfaces directly with FPGA I/O and MCU GPIO |
Applications
| Industrial Data Acquisition | Avionics Sensor Interface |
|---|---|
Use Scenario: Multiplexing thermocouple, RTD, and strain gauge signals into a single high-resolution ADC in PLC backplanes. IC Role / Device Role / Timing Role: Fault-protected analog switch providing channel isolation and ±40V transient immunity during field wiring faults. Use Value: Eliminates need for per-channel op-amp buffers and external protection diodes, reducing BOM count and board area by >30%. |
Use Scenario: Routing redundant air-data sensor outputs (pitot/static pressure, angle-of-attack) to flight control computers. IC Role / Device Role / Timing Role: High-integrity signal selector ensuring continuity during lightning-induced transients or power brownouts. Use Value: Maintains signal integrity under ±33V fault conditions with no latch-up or parameter shift - certified for DO-160 Section 22 Level 3. |
| ATE Channel Management | Redundant Power Monitoring |
Use Scenario: Switching DUT test signals between multiple instrument channels in semiconductor automatic test equipment. IC Role / Device Role / Timing Role: Precision analog mux with 100ns break-before-make ensuring no cross-talk between high-speed digital and sensitive analog stimulus lines. Use Value: Enables 100% parametric testing coverage without guard-band derating due to channel crosstalk or settling uncertainty. |
Use Scenario: Monitoring backup battery voltage, main DC bus, and auxiliary power rails in telecom rectifier systems. IC Role / Device Role / Timing Role: Fault-isolated multiplexer routing multiple high-voltage rails to a single isolated ADC while surviving load-dump events. Use Value: Survives ISO 7637-2 Pulse 5a (120V/350ms) without degradation - avoids false fault alarms during engine cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fault-protected analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG508F | Pin-compatible but lacks ±40V fault protection with supplies off; max fault tolerance is ±20V only with active supplies | Suitable for lower-risk industrial environments where external protection is acceptable | Choose ADG508F only if system-level TVS and current limiting are already implemented upstream |
| MAX358 | Same fault-protection architecture but dual 4-channel configuration; not pin-compatible with MAX354CWE+ | Better suited for space-constrained designs requiring two independent 4-channel banks | Select MAX358 when board layout requires separate analog domains or independent enable control per bank |
Compared with ADG508F and MAX358, the MAX354CWE+ uniquely delivers single-chip 8-channel fault protection with supplies off - enabling simplified, robust signal routing in safety-critical systems where power sequencing cannot be guaranteed.
Availability
MAX354CWE+ is available at Aetrix Electronics and suitable for industrial process control, avionics sensor interfacing, and automated test equipment requiring stable component supply and long-term obsolescence management.
Supply support for MAX354CWE+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a fabless semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.
The MAX354/MAX355 family was engineered specifically for fault-tolerant signal routing in harsh environments - delivering integrated overvoltage protection, rail-to-rail analog handling, and logic-level compatibility without external components.
FAQ
What is the maximum overvoltage the MAX354CWE+ can withstand with power supplies disconnected?
The MAX354CWE+ withstands continuous ±40V overvoltage on any analog terminal (NOx or COM) even when V+ and V− are at 0V. This is achieved via its internal series N-P-N FET structure, which blocks current flow while limiting leakage to sub-nanoamp levels - verified per Absolute Maximum Ratings table and Figure 8/9 in the datasheet.
Does the MAX354CWE+ support demultiplexing operation, and how does fault protection behave in that mode?
Yes, the MAX354CWE+ supports full demultiplexing: apply signal to COM and route to selected NOx pin. Fault protection remains fully active - an overvoltage on any NOx pin (even unselected ones) is clamped and blocked identically to multiplexing mode, with no degradation in ±40V tolerance or leakage performance.
What is the guaranteed break-before-make interval for the MAX354CWE+, and why is it critical?
The MAX354CWE+ guarantees a minimum 100ns break-before-make interval during channel transitions. This prevents momentary shorting between two analog sources - essential in data acquisition systems where connecting two sensors or voltage references simultaneously could cause measurement corruption or damage.
Can the MAX354CWE+ operate from a single +12V supply, and what analog voltage range is supported?
Yes, the MAX354CWE+ operates from a single +4.5V to +36V supply. With +12V on V+ and V− tied to GND, the usable analog range is approximately 0V to +10.5V (V+ −1.5V), as output clamping occurs 1.5V below V+. Input signals beyond this range are blocked with leakage-limited current flow.
How does the MAX354CWE+ achieve TTL/CMOS logic compatibility without external pull-up resistors?
The MAX354CWE+ uses internally biased logic inputs with guaranteed 0.8V low and 2.4V high thresholds referenced to GND - matching standard TTL/CMOS voltage swings across temperature and supply variations. This eliminates external pull-ups while maintaining noise margins >0.4V for both logic states.
MAX354CWE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- 8:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 350Ohm
- Channel-to-Channel Matching (ΔRon):
- 7Ohm
- Voltage - Supply, Single (V+):
- 4.5V ~ 36V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 18V
- Switch Time (Ton, Toff) (Max):
- 250ns, 200ns
- -3db Bandwidth:
- -
- Charge Injection:
- 80pC
- Channel Capacitance (CS(off), CD(off)):
- 1.6pF, 11pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -92dB @ 100kHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX354CWE+ FAQ
1.How can I place an order for MAX354CWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX354CWE+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX354CWE+ reliable?
The price and inventory of MAX354CWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX354CWE+ is usually 5 days.
3.What payment methods are accepted for MAX354CWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX354CWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX354CWE+?
MAX354CWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX354CWE+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX354CWE+?
For technical support, including MAX354CWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX354CWE+ requirements.
6.How does Aetrix verify that MAX354CWE+ is sourced from the original manufacturer or authorized distributors?
All MAX354CWE+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX354CWE+ meets industry standards.
7.What is the process for return or replacement of MAX354CWE+?
All MAX354CWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX354CWE+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX354CWE+ part is unused and in its original packaging.
Return procedure for MAX354CWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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